Detailed Lesson Plan in Science: Heredity and Variation of Traits (Mendelian Genetics), Study notes of Earth science

This detailed lesson plan for grade 8 science focuses on heredity and variation of traits, specifically exploring mendelian genetics. It provides a structured approach to teaching the concepts of inheritance, including mendel's experiments with garden peas, the principles of dominance, segregation, and independent assortment. The plan includes engaging activities, such as a mirror reflection exercise to introduce phenotype, a comic strip analysis to illustrate mendel's principles, and a picture-based activity to reinforce key concepts. It also emphasizes practical applications of genetics in daily life and includes formative assessment questions to evaluate student understanding.

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DETAILED LESSON PLAN IN SCIENCE
GRADE LEVEL
GRADE8
QUARTER / DOMAIN
4TH QUARTER /LIVING THINGS
AND THEIR ENVIRONMENT
WEEK & DAY NO.
WEEK 6 DAY 1
PAGE NO.
1
I. OBJECTIVES
A. Content Standards
The learners demonstrate an understanding of:
1. how cells divide to produce new cells
2. meiosis as one of the processes producing genetic variations of the Mendelian Pattern
of Inheritance
B. Performance
Standards
The learners should be able to report on the importance of variation in plant and animal
breeding.
C. Learning
Competencies/
Objectives
Write the LC code for
each
The learners should be able to predict phenotypic expressions of traits following simple
patterns of inheritance. - S8LT-IVf-18
1. describe how Mendel worked on the garden peas as his genetic tool ;
2. analyze Mendel’s experiment on garden peas to illustrate the Mendelian
principles of inheritance;
3. recognize the value of Mendel’s study in today’s understanding of inheritance
and variations of traits.
II. CONTENT Heredity: Inheritance and Variation of Traits
Mendelian Genetics
III. LEARNING RESOURCES
A. References
1. Teacher’s Guide pages Science 8 Teacher’s Guide pp. 224-227
2. Learner’s Materials
pages
Science- Grade 8 Learner’s Module. 2014
3. Textbook pages
4. Additional Materials
from Learning
Resource (LR) portal
B. Other Learning
Resources
Explore Cornell - Home Gardening - Vegetable Growing Guides - Growing Guide.
Accessed August 25,
2017.http://www.gardening.cornell.edu/homegardening/scene9697.html.
Calverley, Mrs. "7th ch 5 & 6: Genetics." Pinterest. December 21, 2012. Accessed August
25, 2017. https://www.pinterest.com/pin/420523683925513256/.
Ferguson, Alaina. "3.03: Genetics, Punnett squares." SlidePlayer. August 24, 2017.
Accessed August 25, 2017. http://slideplayer.com/slide/6200505/.
Clark, Magnus. "GENETICS 1." SlidePlayer. August 24, 2017. Accessed August 25, 2017.
http://slideplayer.com/slide/6373155/.
"Concept 3 Genes don't blend." Genes don't blend :: DNA from the Beginning. Accessed
August 25, 2017. http://www.dnaftb.org/3/.
IV. PROCEDURES
A. Reviewing previous
lesson or presenting
the new lesson
Mirror! Mirror!
Ask the learners to look at the mirror. Then, after doing so, ask them to describe
himself/herself base on what they saw. The learners can identify as many physical traits
as they can, such as, the color of the hair, the shape of the face, body built, color of the
skin etc.
>Give emphasis that these listed physical traits or characteristics were based on what
they have observed using their eyes. These traits are referred as phenotype.
*Possible answer: Straight hair, pointed nose, round shape face, white color of the skin
B. Establishing a purpose
for the lesson
Match or Scratch?
Instruct the learners to look for a partner and exchange their list of answers. Compare
their list to one another and let them see if they have the same set of traits.
>Are all people look a-like? Why or why not?
*Possible answer: No, there are no two individuals who are exactly the same.
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GRADE LEVEL

GRADE

QUARTER / DOMAIN

4 TH^ QUARTER /LIVING THINGS

AND THEIR ENVIRONMENT

WEEK & DAY NO.

WEEK 6 DAY 1

PAGE NO.

I. OBJECTIVES A. Content Standards The learners demonstrate an understanding of:

  1. how cells divide to produce new cells
  2. meiosis as one of the processes producing genetic variations of the Mendelian Pattern of Inheritance B. Performance Standards The learners should be able to report on the importance of variation in plant and animal breeding. C. Learning Competencies/ Objectives Write the LC code for each The learners should be able to predict phenotypic expressions of traits following simple patterns of inheritance. - S8LT-IVf-
  3. describe how Mendel worked on the garden peas as his genetic tool ;
  4. analyze Mendel’s experiment on garden peas to illustrate the Mendelian principles of inheritance;
  5. recognize the value of Mendel’s study in today’s understanding of inheritance and variations of traits. II. CONTENT Heredity: Inheritance and Variation of Traits Mendelian Genetics III. LEARNING RESOURCES A. References
  6. Teacher’s Guide pages (^) Science 8 Teacher’s Guide pp. 224-
  7. Learner’s Materials pages Science- Grade 8 Learner’s Module. 2014
  8. Textbook pages
  9. Additional Materials from Learning Resource (LR) portal B. Other Learning Resources Explore Cornell - Home Gardening - Vegetable Growing Guides - Growing Guide. Accessed August 25, 2017.http://www.gardening.cornell.edu/homegardening/scene9697.html. Calverley, Mrs. "7th ch 5 & 6: Genetics." Pinterest. December 21, 2012. Accessed August 25, 2017. https://www.pinterest.com/pin/420523683925513256/. Ferguson, Alaina. "3.03: Genetics, Punnett squares." SlidePlayer. August 24, 2017. Accessed August 25, 2017. http://slideplayer.com/slide/6200505/. Clark, Magnus. "GENETICS 1." SlidePlayer. August 24, 2017. Accessed August 25, 2017. http://slideplayer.com/slide/6373155/. "Concept 3 Genes don't blend." Genes don't blend :: DNA from the Beginning. Accessed August 25, 2017. http://www.dnaftb.org/3/. IV. PROCEDURES A. Reviewing previous lesson or presenting the new lesson Mirror! Mirror! Ask the learners to look at the mirror. Then, after doing so, ask them to describe himself/herself base on what they saw. The learners can identify as many physical traits as they can, such as, the color of the hair, the shape of the face, body built, color of the skin etc.

Give emphasis that these listed physical traits or characteristics were based on what they have observed using their eyes. These traits are referred as phenotype. *Possible answer: Straight hair, pointed nose, round shape face, white color of the skin B. Establishing a purpose for the lesson Match or Scratch? Instruct the learners to look for a partner and exchange their list of answers. Compare their list to one another and let them see if they have the same set of traits. Are all people look a-like? Why or why not? *Possible answer: No, there are no two individuals who are exactly the same.

GRADE LEVEL

GRADE

QUARTER / DOMAIN

4 TH^ QUARTER /LIVING THINGS

AND THEIR ENVIRONMENT

WEEK & DAY NO.

WEEK 6 DAY 1

PAGE NO.

C. Presenting examples/instances of the new lesson Take a look at this plant; a Garden Pea plant. Ask the learners to describe it. *Possible answer: Tall, green, with many fruits. Emphasis on these observable traits or phenotype led Gregor Mendel in choosing this plant to be used in conducting his experiment. You can also mention that Gregor Mendel studied the pattern of inheritance using garden pea that led us to the study of genetics. Note: After describing, provide positive feedback/ praises to the learners, e.g.,well said, very good, thank you, etc.

GRADE LEVEL

GRADE

QUARTER / DOMAIN

4 TH^ QUARTER /LIVING THINGS

AND THEIR ENVIRONMENT

WEEK & DAY NO.

WEEK 6 DAY 1

PAGE NO.

E. Discussing new concepts and practicing new skills # Let the learners analyze the result of the crosses used in the previous activity. The learners will describe the Mendelian principles of inheritance based on the diagram of the above crosses. F. Developing mastery (leads to Formative Assessment 3) Picture! Picture! Ask the Learners to formulate a statement out of the given pictures.

*Possible answers:

  1. Children’s resemblanceto their parents.
  2. Genes come in pair.
  3. Genes don’t blend
  4. Some genes are dominant.
  5. Genes are real. First Generation Second Generation TT x tt TT x Tt T tTtTt Tt TTTtTttt tall talltalltall short

GRADE LEVEL

GRADE

QUARTER / DOMAIN

4 TH^ QUARTER /LIVING THINGS

AND THEIR ENVIRONMENT

WEEK & DAY NO.

WEEK 6 DAY 1

PAGE NO.

G. Finding practical applications of concepts and skills in daily living Have the learners identify the physical traits and characteristics they have listed in Activity 1 as to whether it is a resemble to their mother or to their father. Let them see and prove that Mendel’s principle of Inheritance is true. H. Making generalizations and abstractions about the lesson Complete each given statement. Mendel’s Principles of Inheritance Inherited traits are transmitted by 1.______ which occur in alternate forms called 2.________

  1. ___________________________ - when two forms of the same gene are present the dominant allele is expressed.
  2. ___________________________ - in meiosis two alleles separate so that each gamete receives only one form of the gene.
  3. ___________________________ - each trait is inherited independent of other traits. Answer key:
  4. Genes
  5. Allele
  6. Principle of Dominance
  7. Principle of Segregation
  8. Principle of Independent assortment I. Evaluating learning Ask the learners to get a ¼ sheet of paper and answer the following. Tell if the given statement is a Fact or a Bluff
  9. There is pair of factor that controls the appearance of a trait.
  10. According to Mendel’s experiment both genes are dominant.
  11. Law of segregation states that different pairs of genes separate independently of each other during meiosis.
  12. The pair of genes separate.
  13. Offspring can acquire 100% of his characteristics to his father only. Answer key:
  14. Fact
  15. Bluff – One of the gene is dominant and the other is recessive
  16. Bluff- It is the Law of Independent assortment 4.Fact
  17. Bluff- Offspring’s characteristic can be acquired from his father and mother. J. Additional activities for application or remediation V. REMARKS VI. REFLECTION A. No. of learners who earned 80% in the evaluation B. No. of learners who require additional activities for remediation C. Did the remedial lessons work? No. of learners who have caught up with the lesson D. No. of learners who continue to require remediation E. Which of my teaching strategies worked well? Why did these work? F. What difficulties did I encounter which my principal or supervisor can help me solve? G. What innovation or localized materials did I use/discover which I wish to share with other teachers? Prepared: CRISTINE R. ROQUERO Teacher I